I have difficulty believing the two are actually "linked". More likely it is something that nationalists have in common that promote climate change denial.
Short term memory and a shaky grasp on science and history? Lol
I agree though correlation does now equal causation.
maybe a strong overlap because of other things that they believe
If you have a strong conspiratorial bent, it might be part of the mix.
They almost always omit the "man-made" part of the platform when deriding skeptics, like eliding "illegal" when discussing immigrant enforcement and crime. Not an accident.